1   /**
2    * Copyright (c) 2000-2009 Liferay, Inc. All rights reserved.
3    *
4    *
5    *
6    *
7    * The contents of this file are subject to the terms of the Liferay Enterprise
8    * Subscription License ("License"). You may not use this file except in
9    * compliance with the License. You can obtain a copy of the License by
10   * contacting Liferay, Inc. See the License for the specific language governing
11   * permissions and limitations under the License, including but not limited to
12   * distribution rights of the Software.
13   *
14   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
20   * SOFTWARE.
21   */
22  
23  package com.liferay.portlet;
24  
25  import com.liferay.portal.kernel.log.Log;
26  import com.liferay.portal.kernel.log.LogFactoryUtil;
27  import com.liferay.portal.kernel.util.LocaleUtil;
28  
29  import java.io.ByteArrayInputStream;
30  import java.io.IOException;
31  
32  import java.util.HashMap;
33  import java.util.Iterator;
34  import java.util.LinkedHashMap;
35  import java.util.Locale;
36  import java.util.Map;
37  import java.util.MissingResourceException;
38  import java.util.PropertyResourceBundle;
39  import java.util.ResourceBundle;
40  import java.util.concurrent.ConcurrentHashMap;
41  
42  import javax.servlet.http.HttpServletRequest;
43  import javax.servlet.jsp.PageContext;
44  
45  import org.apache.struts.util.RequestUtils;
46  
47  /**
48   * <a href="PortletResourceBundles.java.html"><b><i>View Source</i></b></a>
49   *
50   * @author Brian Wing Shun Chan
51   */
52  public class PortletResourceBundles {
53  
54      public static String getString(PageContext pageContext, String key) {
55          return _instance._getString(pageContext, key);
56      }
57  
58      public static String getString(Locale locale, String key) {
59          return _instance._getString(locale, key);
60      }
61  
62      public static String getString(String languageId, String key) {
63          return _instance._getString(languageId, key);
64      }
65  
66      public static String getString(
67          String servletContextName, String languageId, String key) {
68  
69          return _instance._getString(servletContextName, languageId, key);
70      }
71  
72      public static void put(
73          String servletContextName, String languageId, ResourceBundle bundle) {
74  
75          _instance._put(servletContextName, languageId, bundle);
76      }
77  
78      public static void remove(String servletContextName) {
79          _instance._remove(servletContextName);
80      }
81  
82      private PortletResourceBundles() {
83          _contexts = new ConcurrentHashMap<String, Map<String, ResourceBundle>>(
84              new LinkedHashMap<String, Map<String, ResourceBundle>>());
85      }
86  
87      private ResourceBundle _getBundle(
88          String servletContextName, String languageId) {
89  
90          Map<String, ResourceBundle> bundles = _getBundles(servletContextName);
91  
92          return _getBundle(bundles, languageId);
93      }
94  
95      private ResourceBundle _getBundle(
96          Map<String, ResourceBundle> bundles, String languageId) {
97  
98          ResourceBundle bundle = bundles.get(languageId);
99  
100         if (bundle == null) {
101             try {
102                 bundle = new PropertyResourceBundle(
103                     new ByteArrayInputStream(new byte[0]));
104 
105                 bundles.put(languageId, bundle);
106             }
107             catch (IOException ioe) {
108                 _log.error(ioe);
109             }
110         }
111 
112         return bundle;
113     }
114 
115     private Map<String, ResourceBundle> _getBundles(String servletContextName) {
116         Map<String, ResourceBundle> bundles = _contexts.get(servletContextName);
117 
118         if (bundles == null) {
119             bundles = new HashMap<String, ResourceBundle>();
120 
121             _contexts.put(servletContextName, bundles);
122         }
123 
124         return bundles;
125     }
126 
127     private String _getString(PageContext pageContext, String key) {
128         Locale locale = RequestUtils.getUserLocale(
129             (HttpServletRequest)pageContext.getRequest(), null);
130 
131         return _getString(locale, key);
132     }
133 
134     private String _getString(Locale locale, String key) {
135         return _getString(LocaleUtil.toLanguageId(locale), key);
136     }
137 
138     private String _getString(String languageId, String key) {
139         return _getString(null, languageId, key);
140     }
141 
142     private String _getString(
143         String servletContextName, String languageId, String key) {
144 
145         if (servletContextName != null) {
146             ResourceBundle bundle = _getBundle(servletContextName, languageId);
147 
148             return bundle.getString(key);
149         }
150 
151         Iterator<Map.Entry<String, Map<String, ResourceBundle>>> itr =
152             _contexts.entrySet().iterator();
153 
154         while (itr.hasNext()) {
155             Map.Entry<String, Map<String, ResourceBundle>> entry = itr.next();
156 
157             Map<String, ResourceBundle> bundles = entry.getValue();
158 
159             ResourceBundle bundle = _getBundle(bundles, languageId);
160 
161             try {
162                 return bundle.getString(key);
163             }
164             catch (MissingResourceException mre) {
165             }
166         }
167 
168         return null;
169     }
170 
171     private void _put(
172         String servletContextName, String languageId, ResourceBundle bundle) {
173 
174         Map<String, ResourceBundle> bundles = _getBundles(servletContextName);
175 
176         bundles.put(languageId, bundle);
177     }
178 
179     private void _remove(String servletContextName) {
180         _contexts.remove(servletContextName);
181     }
182 
183     private static Log _log =
184         LogFactoryUtil.getLog(PortletResourceBundles.class);
185 
186     private static PortletResourceBundles _instance =
187         new PortletResourceBundles();
188 
189     private Map<String, Map<String, ResourceBundle>> _contexts;
190 
191 }